loginphp

<?php
session_start();

require_once 'conn.php';


if(isset($_POST['Submit'])){
	$user = $_POST['uname'];
	$pw = $_POST['pw'];
$pword = md5($pw);

	try{
		$result=$mysqli->query("Select count(*) t from test.tbl_users where user_name='".$user."' and user_password='".$pword."' ");
		if($result){
			$row= $res->fetch_assoc();
            	echo $row['t'];
            	if($row['t']){
echo "ok";

            	}else{
            		echo "<script> alert('NOT EXIST'); </script>"
            	}
		}
	}
	catch(Exception $e){
		echo "<script> alert('".$e->getMessage()."''); </script>";
	}
}



?>